Re: NDSolve Question

*To*: mathgroup at smc.vnet.net*Subject*: [mg86426] Re: NDSolve Question*From*: Jerry <Jer75811 at yahoo.com>*Date*: Tue, 11 Mar 2008 02:57:41 -0500 (EST)*References*: <fqtqmp$d82$1@smc.vnet.net> <fr0ckv$ctm$1@smc.vnet.net> <fr2mds$o2e$1@smc.vnet.net>

Thank you sir; I embarrassed myself again. jwmerrill at gmail.com wrote: > On Mar 9, 6:03 am, Jerry <Jer75... at yahoo.com> wrote: >> Sir, I tried this and I only get plot axes, no graph. >> >> f[q_?NumberQ] := q >> sol = NDSolve[{x'[t] == f[x[t]], x[0] == 0}, {x}, {t, 0, 1}] >> Plot[x[t] /. sol, {t, 0, 1}] > > Try using an initial condition such that your function isn't always > 0 ;-). In other words, 0*exp[t] == 0. > > f[q_?NumberQ] := q > sol = NDSolve[{x'[t] == f[x[t]], x[0] == 1}, {x}, {t, 0, 1}] > Plot[x[t] /. sol, {t, 0, 1}] > >> In place of {x} in sol I tried x and x[t] with no change. >> In Plot I tried x instead of x[t], no help. > > I think any of these will work, actually. > > JM > >